java基本类型缓存

    public static void main(String[] args) {
        Integer a = 127;
        Integer b = 127;
        System.out.println("a==b："+(a==b));　　//a==b：true
        Integer c = new Integer(127);
        Integer d = new Integer(127);
        System.out.println("a==b："+(c==d));　　//a==b：false
        Integer e = 128;
        Integer f = 128;
        System.out.println("a==b："+(e==f));　　//a==b：false
    }